Process for the production of metallate silicate.



RUDOLPH BOEHBINEB, 'OF PLAINFI ELD, NEW -If1llR$Efi', AND ALBERT G-ESSLER, 0E CLIFTON,

STATEN ISLdND, NEW YQRR yEQCESS 30 B THE PBODUGTKQN 43F METALLLATE SILICAEE.

Specification or Zetters Retest.

Patentedri'anc dd, E9138 serial 350. 557,562.

L5 1h2eh E0 Drawing. Application filed June 17, 192.0.

To all whom it may; concern:

be it known that we, Renown Bonnnmenn and ALBERT Enwann Gnssnnn, sub jects or" the German Empire, residing, respectively, at 57 Sanford avenue, in the city of Pia-infield, county of Union, and State of New Jersey, and at 59 Simonson avenue, in the town of Clifton, Staten Island, in the county of Richmond and State of New York, havejointly invented a new and Improved Process for he Production of Metallate Silicate, of which the following is a specification.

The object ofour invention is to produce a commercial article adapted to the softening of water and for other purposes, which can be readily made, which is cheaper to manufacture and is more effective than any now known. And to this end our invention consists, in producing metallate silicate by making a solution of a soluble alkali salt of a metal hydroxid, as of aluminum, lead, zinc or tin and then mixing the same with a solution of an alkali silicate (sodium or potassium) and precipitating a metallate silicate of the metal employed. This product is then neutralized by washing, it is then filtered and when dry is ready for use.

In carrying out our process we preferably make a solution of the soluble alkali salt of the metal hydroxid in a receptacle by itself and then slowly introduce a solution of an alkali silicate into the solution of the alkali salt of the metal hydroxid and thereby precipitate a metallate silicate, providing there is not present too great an excess of caustic alkali. Should there be a sulhciency of caustic alkali present to maintain the ingredients in a state of solution the strength of the alkali is reduced until a precipitation of the metallate silicate is efiecte For example: when using aluminum, take fifty parts of sodium aluminate (of about fifty per cent. strength) and dis solve it in about thirty five hundred parts of water and slowly run therein a solution of one hundred and twenty parts of sodium silicate (of about forty per cent. strength) dissolve in about five hundred parts of water when aluminate silicate will precipitate in a flaky form. This is washed until neutral; it is then filtered and dried when it is ready for use. The reaction in this case expressed in the form of a chemical equation is:

Should there he an excem oi caustic alkali present or enough to prevent preci itation of nietallate silicate it can be r need by neutralizing with an acid and preferably with muriatic acid.

"When. using lead, we take, say fifty parts of lead acetate, dissolve it in two hundred parts of water and add three hundred and fifty parts of caustic soda solution (of about forty degrees Baum strength) diluted with one thousand part-s of water; to this solu tion add one hundred parts of soda silicate solution (of about forty per cent. strength) diluted with about ;,five hundred water when plumbite silicate will precipitate, this is washed until neutral, then filtered and when dry it is ready for use, The

reaction expressed in the form of a chemical equation is:

When using zinc, we take say fifty parts of zinc sulfate and dissolve it in about two thousand-parts of water; we then add about five hundred parts of a forty degree Baum caustic soda solution which has been diluted with one thousand parts of water precipitating and dissolving the zinc hydroxid; then one hundred arts of soda silicate solution (of about orty per cent. strength) diluted with five hundred parts of water is added when zincate silicate precipitates. this is washed until neutral is then filtered and dried when it is ready l' or use, The reaction in this case, a chemical equation is:

expressed in the form of parts of When using tin, we take say fifty parts of tin bichlorid and dissolve it in two thousand parts of water, then two hundred parts of a forty degree Baum caustic soda solution diluted with a thousand parts of water is added precipitating and dissolving the tin hydroxid; to this one hundred parts of a sodium silicate solution (of about forty per cent.- strength) diluted with live hundred parts i-of water is added when atannate silicate precipitates, this is washed until neutral is then filtered and dried when it is ready or use. The reaction in this case, expressed in the form of a chemical equation is:

silicates with the soluble alkali salts of such metal hydroxide as have an acidic char-- acter.

By the means described an insoluble compound of a metal is formed which, in consequence of its physical properties and the chemical exchange of bases which takes place during its use, renders it especially adaptable for the softening of water and for other purposes.

-Ha-ving describedwe claim and desire to secure by Letters Patent of the United States is:

1. The process of producing metallate silicate which consists; in combining a u dea ension.

lated "and prop its presence mainsilicate, it will be 6st invention--what menace oluble alkali salt of a metal hydromid solution with an alkali silicate solution under conditions of strength and in proportions operating to recipitate metallate silicate, al substantial y as set forth.

2. The process of producing metallate silicate which consists; in making a solu tion containing a soluble alkali salt of a metal hydroxid; in making a se arate solution containing alkali silicate, oth calcuortioned to'efi'ect the evolu-. tion and precipitation of metallate silicate when the saidsolutions are brought in contact; in mixing the said. solutions thereby precipitating metallate silicate, substan tially as set forth.

3. The. process oi producing metallate silicate which consists, in mixing a solution of a soluble alkali salt of a metal hydroxid and a solution of an alkali silicate in proportions to effect a precipitation of metallate silicate and preci itatingthe same substantially as describe a 4:. The method of producing aluminate silicate which consists; in mixing a sodium aluminate solution with a solution of sodium silicate in chemically equivalent quantities and suiiiciently dilute to cause the formation of a flaky precipitate of aluminate silicate, substantially as described. *RUDOLPH BOEHRINGER.

' ALBERT EDWARD GESSLER. in the presence of-' JosnrH H. Tum, Tnoms A. GRADY. 

